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Acta Neuropathol Commun. 2018 Jun 29;6(1):53. doi: 10.1186/s40478-018-0556-7.

Neuroimaging-pathological correlations of [18F]THK5351 PET in progressive supranuclear palsy.

Author information

1
Department of Geriatrics and Gerontology, Division of Brain Science, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan.
2
Department of Geriatrics and Gerontology, Division of Brain Science, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan. ryuichi.harada.c8@tohoku.ac.jp.
3
Department of Pharmacology, Tohoku University School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan. ryuichi.harada.c8@tohoku.ac.jp.
4
Department of Pharmacology, Tohoku University School of Medicine 2-1, Seiryo-machi, Aoba-ku, Sendai, 9808575, Japan. ryuichi.harada.c8@tohoku.ac.jp.
5
Department of Neurological Science, Tohoku University School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan.
6
Department of Pathology, Tohoku University School of Medicine, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan.
7
Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan.
8
Cyclotron and Radioisotope Center, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, Japan.
9
Department of Pharmacology, Tohoku University School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan.
10
Division of Community Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1 Fukumuro, Miyagino-ku, Sendai, Miyagi, Japan.
11
Division of Pharmacology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1 Fukumuro, Miyagino-ku, Sendai, Miyagi, Japan.

Abstract

Recent positron emission tomography (PET) studies have demonstrated the accumulation of tau PET tracer in the affected region of progressive supranuclear palsy (PSP) cases. To confirm the binding target of radiotracer in PSP, we performed an imaging-pathology correlation study in two autopsy-confirmed PSP patients who underwent [18F]THK5351 PET before death. One patient with PSP Richardson syndrome showed elevated tracer retention in the globus pallidus and midbrain. In a patient with PSP-progressive nonfluent aphasia, [18F]THK5351 retention also was observed in the cortical areas, particularly the temporal cortex. Neuropathological examination confirmed PSP in both patients. Regional [18F]THK5351 standardized uptake value ratio (SUVR) in antemortem PET was significantly correlated with monoamine oxidase-B (MAO-B) level, reactive astrocytes density, and tau pathology at postmortem examination. In in vitro autoradiography, specific THK5351 binding was detected in the area of antemortem [18F]THK5351 retention, and binding was blocked completely by a reversible selective MAO-B inhibitor, lazabemide, in brain samples from these patients. In conclusion, [18F]THK5351 PET signals reflect MAO-B expressing reactive astrocytes, which may be associated with tau accumulation in PSP.

KEYWORDS:

Monoamine oxidase; PET; PSP; Reactive astrocyte; Tau; [18F]THK5351

PMID:
29958546
PMCID:
PMC6025736
DOI:
10.1186/s40478-018-0556-7
[Indexed for MEDLINE]
Free PMC Article

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